| 초록 |
Although solid polymer electrolytes (SPEs) have many advantages, they have not been applied to electrochemical devices owing to low ionic conductivity at room temperature. So, to obtain high ambient conductivity of SPE, we introduced polymer-in-salt system contrary to traditional salt-in-polymer system. In this system, harmony between polymer and salt and solubility of polymer for salt are important because polymer-in-salt electrolyte contains a large amount of salts. Then, we prepared SPEs consisting of two types of polymers (poly(ethylene oxide) (PEO, hard base) and poly(ethylene imine) (PEI, softer base than PEO)) and four types of salts (LiCF3SO3(hard cation/hard anion), LiCl(hard cation/soft anion), AgCF3SO3(soft cation/hard anion), and AgCl(soft cation/soft anion)) according to hard/soft acid base (HSAB) principle and investigated the effect of HSAB principle in polymer-in-salt system by using ac impedance analyzer and FT-IR spectroscope. |
